644648080

素因数分解:

$2^4\times 5^1\times {\mathrm{8058101}}^1$

素因数の和:8058114

約数の個数: 20

約数和(自身を含む): 1498806972

約数和(自身を除く): 854158892

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 8058101, 16116202, 32232404, 40290505, 64464808, 80581010, 128929616, 161162020, 322324040, 644648080]

約数ペア:

[(1, 644648080), (2, 322324040), (4, 161162020), (5, 128929616), (8, 80581010), (10, 64464808), (16, 40290505), (20, 32232404), (40, 16116202), (80, 8058101)]